We should not forget. His treatments are not the same -IMO- as Stalin's erasing people from official state portraits.
I haven't walked in Mr Smejkal's shoes to see his thinking but I cannot agree with the usefulness of the result.
The profoundly edited images only exist as faint echoes of the originals. Why would one aid in the 'erasing' of history?
The resulting images have nothing to recommend them visually either, having been stripped of their essentials.
It's a tougher call for me visually. As stand-alone images (without their history), some of these appeal to my aesthetic. But who knows, is the manipulation of pre-existing images an artform? I have no idea.